java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:10,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:10,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:10,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:10,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:10,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:10,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:10,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:10,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:10,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:10,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:10,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:10,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:10,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:10,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:10,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:10,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:10,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:10,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:10,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:10,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:10,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:10,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:10,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:10,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:10,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:10,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:10,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:10,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:10,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:10,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:10,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:10,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:10,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:10,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:10,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:10,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:03:10,950 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:10,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:10,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:10,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:10,954 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:10,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:10,954 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:10,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:10,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:10,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:10,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:10,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:10,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:10,957 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:10,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:10,957 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:10,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:10,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:10,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:10,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:10,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:10,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:10,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:10,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:10,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:10,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:10,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:10,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:10,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:11,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:11,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:11,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:11,261 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:11,261 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:11,262 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label42.c [2019-10-13 18:03:11,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ec07fc0/0c4d7354e9a94823abc9d4ea662aedc9/FLAG24cdf1098 [2019-10-13 18:03:11,944 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:11,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label42.c [2019-10-13 18:03:11,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ec07fc0/0c4d7354e9a94823abc9d4ea662aedc9/FLAG24cdf1098 [2019-10-13 18:03:12,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ec07fc0/0c4d7354e9a94823abc9d4ea662aedc9 [2019-10-13 18:03:12,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:12,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:12,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:12,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:12,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:12,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:12" (1/1) ... [2019-10-13 18:03:12,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3feed334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:12, skipping insertion in model container [2019-10-13 18:03:12,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:12" (1/1) ... [2019-10-13 18:03:12,331 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:12,389 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:13,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:13,029 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:13,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:13,258 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:13,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13 WrapperNode [2019-10-13 18:03:13,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:13,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:13,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:13,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:13,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13" (1/1) ... [2019-10-13 18:03:13,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13" (1/1) ... [2019-10-13 18:03:13,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13" (1/1) ... [2019-10-13 18:03:13,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13" (1/1) ... [2019-10-13 18:03:13,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13" (1/1) ... [2019-10-13 18:03:13,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13" (1/1) ... [2019-10-13 18:03:13,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13" (1/1) ... [2019-10-13 18:03:13,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:13,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:13,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:13,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:13,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:13,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:13,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:13,539 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:13,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:13,539 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:13,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:13,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:13,540 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:13,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:13,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:13,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:15,126 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:15,127 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:15,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:15 BoogieIcfgContainer [2019-10-13 18:03:15,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:15,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:15,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:15,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:15,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:12" (1/3) ... [2019-10-13 18:03:15,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcb193e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:15, skipping insertion in model container [2019-10-13 18:03:15,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:13" (2/3) ... [2019-10-13 18:03:15,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcb193e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:15, skipping insertion in model container [2019-10-13 18:03:15,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:15" (3/3) ... [2019-10-13 18:03:15,138 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label42.c [2019-10-13 18:03:15,148 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:15,157 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:15,169 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:15,197 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:15,197 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:15,197 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:15,197 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:15,198 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:15,198 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:15,198 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:15,198 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:03:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 18:03:15,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:15,234 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:15,236 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:15,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1174892051, now seen corresponding path program 1 times [2019-10-13 18:03:15,251 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:15,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634590901] [2019-10-13 18:03:15,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:15,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:15,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:15,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634590901] [2019-10-13 18:03:15,593 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:15,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:15,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262901489] [2019-10-13 18:03:15,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:15,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:15,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:15,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:15,616 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:18,529 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:03:18,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:18,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-10-13 18:03:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:18,554 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:03:18,554 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:18,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:03:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:03:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:03:18,660 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 48 [2019-10-13 18:03:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:18,660 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:03:18,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:03:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 18:03:18,668 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:18,668 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:18,669 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:18,669 INFO L82 PathProgramCache]: Analyzing trace with hash -56716970, now seen corresponding path program 1 times [2019-10-13 18:03:18,669 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:18,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968206295] [2019-10-13 18:03:18,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:18,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:18,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:18,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968206295] [2019-10-13 18:03:18,985 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:18,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:03:18,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405967557] [2019-10-13 18:03:18,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:18,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:18,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:18,989 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:03:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:21,061 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-13 18:03:21,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:03:21,062 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 134 [2019-10-13 18:03:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:21,069 INFO L225 Difference]: With dead ends: 1320 [2019-10-13 18:03:21,070 INFO L226 Difference]: Without dead ends: 768 [2019-10-13 18:03:21,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-13 18:03:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-13 18:03:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-13 18:03:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-13 18:03:21,110 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 134 [2019-10-13 18:03:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:21,111 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-13 18:03:21,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-13 18:03:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 18:03:21,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:21,115 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:21,115 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash -867586423, now seen corresponding path program 1 times [2019-10-13 18:03:21,120 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:21,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924972357] [2019-10-13 18:03:21,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:21,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:21,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:21,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924972357] [2019-10-13 18:03:21,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443613488] [2019-10-13 18:03:21,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:21,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:21,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:21,663 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:21,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:21,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450090960] [2019-10-13 18:03:21,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:21,668 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:21,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:21,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:21,675 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-13 18:03:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:22,569 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-10-13 18:03:22,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:22,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2019-10-13 18:03:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:22,589 INFO L225 Difference]: With dead ends: 1680 [2019-10-13 18:03:22,589 INFO L226 Difference]: Without dead ends: 1120 [2019-10-13 18:03:22,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-13 18:03:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-10-13 18:03:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-13 18:03:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-10-13 18:03:22,653 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 143 [2019-10-13 18:03:22,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:22,655 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-10-13 18:03:22,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-10-13 18:03:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-13 18:03:22,669 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:22,669 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:22,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:22,873 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:22,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1724923771, now seen corresponding path program 1 times [2019-10-13 18:03:22,875 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:22,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578063543] [2019-10-13 18:03:22,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:22,876 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:22,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:23,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578063543] [2019-10-13 18:03:23,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311861965] [2019-10-13 18:03:23,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:24,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:24,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 18:03:24,165 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:24,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2019-10-13 18:03:24,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757105848] [2019-10-13 18:03:24,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:24,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:24,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:24,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:24,168 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-10-13 18:03:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:25,087 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-10-13 18:03:25,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:25,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 246 [2019-10-13 18:03:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:25,102 INFO L225 Difference]: With dead ends: 2414 [2019-10-13 18:03:25,102 INFO L226 Difference]: Without dead ends: 1486 [2019-10-13 18:03:25,106 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 250 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-10-13 18:03:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-10-13 18:03:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-10-13 18:03:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-10-13 18:03:25,165 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 246 [2019-10-13 18:03:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:25,166 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-10-13 18:03:25,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-10-13 18:03:25,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-10-13 18:03:25,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:25,175 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:25,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:25,379 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:25,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1559737594, now seen corresponding path program 1 times [2019-10-13 18:03:25,380 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:25,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337701176] [2019-10-13 18:03:25,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-10-13 18:03:25,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337701176] [2019-10-13 18:03:25,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400227020] [2019-10-13 18:03:25,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:25,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 18:03:25,882 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:25,882 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-10-13 18:03:25,882 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276661365] [2019-10-13 18:03:25,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:25,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:25,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:25,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:03:25,884 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-10-13 18:03:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:26,703 INFO L93 Difference]: Finished difference Result 3156 states and 4351 transitions. [2019-10-13 18:03:26,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:26,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2019-10-13 18:03:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:26,716 INFO L225 Difference]: With dead ends: 3156 [2019-10-13 18:03:26,717 INFO L226 Difference]: Without dead ends: 1858 [2019-10-13 18:03:26,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:03:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-10-13 18:03:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-10-13 18:03:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-10-13 18:03:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2298 transitions. [2019-10-13 18:03:26,784 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2298 transitions. Word has length 265 [2019-10-13 18:03:26,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:26,785 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2298 transitions. [2019-10-13 18:03:26,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:26,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2298 transitions. [2019-10-13 18:03:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-10-13 18:03:26,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:26,791 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:26,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:26,995 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:26,996 INFO L82 PathProgramCache]: Analyzing trace with hash -81866982, now seen corresponding path program 1 times [2019-10-13 18:03:26,996 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:26,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187614403] [2019-10-13 18:03:26,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:26,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:26,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 151 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:27,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187614403] [2019-10-13 18:03:27,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637753445] [2019-10-13 18:03:27,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:27,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:27,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 18:03:27,714 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:27,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-13 18:03:27,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371976712] [2019-10-13 18:03:27,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:27,716 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:27,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:27,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:27,717 INFO L87 Difference]: Start difference. First operand 1674 states and 2298 transitions. Second operand 5 states. [2019-10-13 18:03:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:29,131 INFO L93 Difference]: Finished difference Result 3930 states and 5406 transitions. [2019-10-13 18:03:29,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:29,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 271 [2019-10-13 18:03:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:29,144 INFO L225 Difference]: With dead ends: 3930 [2019-10-13 18:03:29,144 INFO L226 Difference]: Without dead ends: 2262 [2019-10-13 18:03:29,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:03:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-10-13 18:03:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2070. [2019-10-13 18:03:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-10-13 18:03:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2743 transitions. [2019-10-13 18:03:29,213 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2743 transitions. Word has length 271 [2019-10-13 18:03:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:29,213 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2743 transitions. [2019-10-13 18:03:29,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2743 transitions. [2019-10-13 18:03:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2019-10-13 18:03:29,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:29,222 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:29,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:29,434 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:29,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1471725011, now seen corresponding path program 1 times [2019-10-13 18:03:29,435 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:29,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379457951] [2019-10-13 18:03:29,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:29,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:29,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 133 proven. 262 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:30,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379457951] [2019-10-13 18:03:30,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306437961] [2019-10-13 18:03:30,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:30,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:30,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:30,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 307 proven. 53 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 18:03:31,204 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:31,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:31,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929152211] [2019-10-13 18:03:31,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:31,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:31,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:31,207 INFO L87 Difference]: Start difference. First operand 2070 states and 2743 transitions. Second operand 16 states. [2019-10-13 18:03:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:35,261 INFO L93 Difference]: Finished difference Result 4460 states and 5930 transitions. [2019-10-13 18:03:35,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:03:35,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 355 [2019-10-13 18:03:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:35,273 INFO L225 Difference]: With dead ends: 4460 [2019-10-13 18:03:35,273 INFO L226 Difference]: Without dead ends: 2349 [2019-10-13 18:03:35,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:03:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2019-10-13 18:03:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2268. [2019-10-13 18:03:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2019-10-13 18:03:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2754 transitions. [2019-10-13 18:03:35,343 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2754 transitions. Word has length 355 [2019-10-13 18:03:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:35,344 INFO L462 AbstractCegarLoop]: Abstraction has 2268 states and 2754 transitions. [2019-10-13 18:03:35,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2754 transitions. [2019-10-13 18:03:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2019-10-13 18:03:35,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:35,354 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:35,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:35,558 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash 859589664, now seen corresponding path program 1 times [2019-10-13 18:03:35,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:35,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37372294] [2019-10-13 18:03:35,559 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:35,559 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:35,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 189 proven. 158 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-13 18:03:36,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37372294] [2019-10-13 18:03:36,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542756183] [2019-10-13 18:03:36,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:36,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:36,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:03:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-10-13 18:03:36,824 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:36,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-10-13 18:03:36,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430780163] [2019-10-13 18:03:36,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:36,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:36,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:36,834 INFO L87 Difference]: Start difference. First operand 2268 states and 2754 transitions. Second operand 5 states. [2019-10-13 18:03:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:37,876 INFO L93 Difference]: Finished difference Result 5098 states and 6238 transitions. [2019-10-13 18:03:37,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:37,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 380 [2019-10-13 18:03:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:37,889 INFO L225 Difference]: With dead ends: 5098 [2019-10-13 18:03:37,889 INFO L226 Difference]: Without dead ends: 2836 [2019-10-13 18:03:37,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:37,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-13 18:03:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2832. [2019-10-13 18:03:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-10-13 18:03:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3446 transitions. [2019-10-13 18:03:37,965 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3446 transitions. Word has length 380 [2019-10-13 18:03:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:37,965 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3446 transitions. [2019-10-13 18:03:37,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3446 transitions. [2019-10-13 18:03:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2019-10-13 18:03:37,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:37,980 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:38,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:38,184 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:38,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1583114957, now seen corresponding path program 1 times [2019-10-13 18:03:38,185 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:38,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842575248] [2019-10-13 18:03:38,185 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:38,185 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:38,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 390 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:03:38,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842575248] [2019-10-13 18:03:38,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963100155] [2019-10-13 18:03:38,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:39,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-13 18:03:39,285 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:39,285 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:03:39,285 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41005310] [2019-10-13 18:03:39,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:39,287 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:39,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:39,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:39,287 INFO L87 Difference]: Start difference. First operand 2832 states and 3446 transitions. Second operand 9 states. [2019-10-13 18:03:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:41,139 INFO L93 Difference]: Finished difference Result 5490 states and 6736 transitions. [2019-10-13 18:03:41,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:03:41,140 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 490 [2019-10-13 18:03:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:41,154 INFO L225 Difference]: With dead ends: 5490 [2019-10-13 18:03:41,154 INFO L226 Difference]: Without dead ends: 2846 [2019-10-13 18:03:41,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 503 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:41,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-10-13 18:03:41,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2842. [2019-10-13 18:03:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2019-10-13 18:03:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3315 transitions. [2019-10-13 18:03:41,230 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3315 transitions. Word has length 490 [2019-10-13 18:03:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:41,231 INFO L462 AbstractCegarLoop]: Abstraction has 2842 states and 3315 transitions. [2019-10-13 18:03:41,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3315 transitions. [2019-10-13 18:03:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2019-10-13 18:03:41,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:41,241 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:41,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:41,454 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:41,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1191523692, now seen corresponding path program 1 times [2019-10-13 18:03:41,455 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:41,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314305678] [2019-10-13 18:03:41,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 523 proven. 118 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-13 18:03:42,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314305678] [2019-10-13 18:03:42,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760855603] [2019-10-13 18:03:42,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:03:42,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:43,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 884 proven. 2 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2019-10-13 18:03:43,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:43,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:03:43,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132395170] [2019-10-13 18:03:43,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:03:43,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:43,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:03:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:43,631 INFO L87 Difference]: Start difference. First operand 2842 states and 3315 transitions. Second operand 12 states. [2019-10-13 18:03:45,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:45,715 INFO L93 Difference]: Finished difference Result 5780 states and 6763 transitions. [2019-10-13 18:03:45,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:03:45,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 574 [2019-10-13 18:03:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:45,728 INFO L225 Difference]: With dead ends: 5780 [2019-10-13 18:03:45,728 INFO L226 Difference]: Without dead ends: 3085 [2019-10-13 18:03:45,736 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 593 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:03:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2019-10-13 18:03:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2834. [2019-10-13 18:03:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-10-13 18:03:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3182 transitions. [2019-10-13 18:03:45,827 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3182 transitions. Word has length 574 [2019-10-13 18:03:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:45,828 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3182 transitions. [2019-10-13 18:03:45,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:03:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3182 transitions. [2019-10-13 18:03:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2019-10-13 18:03:45,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:45,836 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:46,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:46,041 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1767004544, now seen corresponding path program 2 times [2019-10-13 18:03:46,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:46,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879825708] [2019-10-13 18:03:46,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:46,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:46,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 746 proven. 235 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-10-13 18:03:46,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879825708] [2019-10-13 18:03:46,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712204683] [2019-10-13 18:03:46,932 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:47,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 18:03:47,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 18:03:47,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:47,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:47,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms